Short questionnaires will be completed by the investigator whilst in contact with the patient (either in person or by telephone) at the following time points: 1) Screening prior to the first QUTENZA treatment; 2) at each QUTENZA treatment visit; 3) 2 weeks, 8 weeks following the first QUTENZA treatment 4) 12 weeks following each QUTENZA treatment; 5) any additional contact with the patient outside the protocol schedule.